feat! equiv.hpp include, which deprecates is_same.hpp.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

3 files changed, 76 insertions, 106 deletions

diff --git a/include/ocl/equiv.hpp b/include/ocl/equiv.hpp
new file mode 100644
index 0000000..ac6e2cd
--- /dev/null
+++ b/include/ocl/equiv.hpp
@@ -0,0 +1,64 @@
+/*
+ * File: equiv.hpp
+ * Purpose: Equivalence header.
+ * Author: Amlal El Mahrouss (amlal@nekernel.org)
+ * Copyright 2025, Amlal El Mahrouss, licensed under the Boost Software License.
+ */
+
+#ifndef __OCL_CORE_EQUIV
+#define __OCL_CORE_EQUIV
+
+#include <ocl/detail/config.hpp>
+
+/// @brief OCL equivalence namespace.
+namespace ocl
+{
+	template <class T>
+	struct basic_hash final
+	{
+		using result_type = typename T::result_type;
+		using type		  = T;
+
+		// AMLALE: If it throws, we can't compute the hash correctly.
+		constexpr result_type hash() noexcept
+		{
+			return type{}.hash();
+		}
+	};
+
+	template <typename T>
+	struct is_real final
+	{
+		using type					= T;
+		static constexpr auto value = false;
+	};
+
+	template <typename L, typename R>
+	struct equiv_to final
+	{
+		using left_type	 = L;
+		using right_type = R;
+
+		static constexpr auto value = false;
+	};
+
+	template <typename L>
+	struct equiv_to<L, L> final
+	{
+		static constexpr auto value = true;
+	};
+
+	template <>
+	struct is_real<double> final
+	{
+		static constexpr auto value = true;
+	};
+
+	template <>
+	struct is_real<float> final
+	{
+		static constexpr auto value = true;
+	};
+} // namespace ocl
+
+#endif
diff --git a/include/ocl/is_same.hpp b/include/ocl/is_same.hpp
index b8b5ccf..4ed0dc7 100644
--- a/include/ocl/is_same.hpp
+++ b/include/ocl/is_same.hpp
@@ -1,104 +1,10 @@
-/*
- * File: is_same.hpp
- * Purpose: Equivalence header.
- * Author: Amlal El Mahrouss (amlal@nekernel.org)
- * Copyright 2025, Amlal El Mahrouss, licensed under the Boost Software License.
- */
+#pragma once
 
-#ifndef __OCL_CORE_IS_SAME
-#define __OCL_CORE_IS_SAME
+#if __cplusplus <= 202301L
+#error "This header has been deprecated, it now redirects to equiv.hpp"
+#else
+#warning "This header has been deprecated, it now redirects to equiv.hpp"
+#endif 
 
-#include <ocl/detail/config.hpp>
+#include <ocl/equiv.hpp>
 
-/// @brief OCL equivalence namespace.
-namespace ocl
-{
-	template <typename T>
-	struct basic_hash final
-	{
-		using result_type = typename T::result_type;
-		using type		  = T;
-
-		// AMLALE: If it throws, we can't compute the hash correctly.
-		static constexpr result_type hash() noexcept
-		{
-			return T{}.hash();
-		}
-	};
-
-	template <typename T, typename U>
-	struct is_same
-	{
-		using left_type	 = T;
-		using right_type = T;
-
-		static constexpr bool value = false;
-	};
-
-	template <typename T>
-	struct is_same<T, T>
-	{
-		static constexpr bool value = true;
-	};
-
-	template <typename T, typename U>
-	struct is_not_same
-	{
-		using left_type	 = T;
-		using right_type = T;
-
-		static constexpr bool value = true;
-	};
-
-	template <typename T>
-	struct is_not_same<T, T>
-	{
-		static constexpr bool value = false;
-	};
-
-	template <typename T>
-	struct equiv_is_int8 final
-	{
-		using result_type = bool;
-
-		static constexpr auto value = sizeof(T) == 1;
-	};
-
-	template <typename T>
-	struct equiv_not_int8 final
-	{
-		using result_type = bool;
-
-		static constexpr auto value = sizeof(T) > 1;
-	};
-
-	template <typename T>
-	struct equiv_is_real final
-	{
-		using result_type = bool;
-
-		static constexpr auto value = sizeof(T) >= 4;
-	};
-
-	template <typename L, typename R>
-	struct equiv_is final
-	{
-		using result_type = bool;
-		using left_type	  = L;
-		using right_type  = R;
-
-		static constexpr auto value = false;
-	};
-
-	template <typename L>
-	struct equiv_is<L, L> final
-	{
-		using result_type = bool;
-		using left_type	  = L;
-		using right_type  = L;
-
-		static constexpr auto value = true;
-	};
-} // namespace ocl
-
-#endif
\ No newline at end of file
diff --git a/include/ocl/option.hpp b/include/ocl/option.hpp
index 2fa47e9..c1c8476 100644
--- a/include/ocl/option.hpp
+++ b/include/ocl/option.hpp
@@ -12,7 +12,7 @@
 
 namespace ocl
 {
-	enum struct return_type
+	enum struct return_type : int
 	{
 		invalid = 0,
 		okay	= 100,
@@ -67,12 +67,12 @@ namespace ocl
 
 	namespace detail
 	{
-		// AMLALE: They (operator()) were marked `noexcept` as failing conditions within an evaluation (say a overloads operator==) proves that the
-		// predictate is wrong.
+		// AMLALE: The operator() are marked as `noexcept` as failing conditions within an evaluation (say a overloads operator==) proves that the
+		// predictate is wrong. Thus program state is undefined.
 
 		struct teller
 		{
-			explicit teller() = default;
+			teller()		  = default;
 			virtual ~teller() = default;
 
 			template <class ObjFirst, class ObjLast>
@@ -151,4 +151,4 @@ namespace ocl
 	}
 } // namespace ocl
 
-#endif /* ifndef __OCL_CORE_OPTION */
\ No newline at end of file
+#endif /* ifndef __OCL_CORE_OPTION */